Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 | // SPDX-License-Identifier: GPL-2.0-only /* * Elantech Touchpad driver (v6) * * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> * * Trademarks are the property of their respective owners. */ #include <linux/delay.h> #include <linux/dmi.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/platform_device.h> #include <linux/serio.h> #include <linux/libps2.h> #include <asm/unaligned.h> #include "psmouse.h" #include "elantech.h" #include "elan_i2c.h" #define elantech_debug(fmt, ...) \ do { \ if (etd->info.debug) \ psmouse_printk(KERN_DEBUG, psmouse, \ fmt, ##__VA_ARGS__); \ } while (0) /* * Send a Synaptics style sliced query command */ static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) { if (ps2_sliced_command(&psmouse->ps2dev, c) || ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); return -1; } return 0; } /* * V3 and later support this fast command */ static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) { struct ps2dev *ps2dev = &psmouse->ps2dev; if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) || ps2_command(ps2dev, NULL, c) || ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); return -1; } return 0; } /* * A retrying version of ps2_command */ static int elantech_ps2_command(struct psmouse *psmouse, unsigned char *param, int command) { struct ps2dev *ps2dev = &psmouse->ps2dev; struct elantech_data *etd = psmouse->private; int rc; int tries = ETP_PS2_COMMAND_TRIES; do { rc = ps2_command(ps2dev, param, command); if (rc == 0) break; tries--; elantech_debug("retrying ps2 command 0x%02x (%d).\n", command, tries); msleep(ETP_PS2_COMMAND_DELAY); } while (tries > 0); if (rc) psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command); return rc; } /* * Send an Elantech style special command to read 3 bytes from a register */ static int elantech_read_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) { if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { psmouse_err(psmouse, "failed to read register %#02x\n", reg); return -EIO; } return 0; } /* * Send an Elantech style special command to write a register with a parameter */ static int elantech_write_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) { if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, param[0]) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, param[1]) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { psmouse_err(psmouse, "failed to write register %#02x with value %#02x%#02x\n", reg, param[0], param[1]); return -EIO; } return 0; } /* * Send an Elantech style special command to read a value from a register */ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, unsigned char *val) { struct elantech_data *etd = psmouse->private; unsigned char param[3]; int rc = 0; if (reg < 0x07 || reg > 0x26) return -1; if (reg > 0x11 && reg < 0x20) return -1; switch (etd->info.hw_version) { case 1: if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_READ) || ps2_sliced_command(&psmouse->ps2dev, reg) || ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { rc = -1; } break; case 2: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { rc = -1; } break; case 3 ... 4: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { rc = -1; } break; } if (rc) psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg); else if (etd->info.hw_version != 4) *val = param[0]; else *val = param[1]; return rc; } /* * Send an Elantech style special command to write a register with a value */ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, unsigned char val) { struct elantech_data *etd = psmouse->private; int rc = 0; if (reg < 0x07 || reg > 0x26) return -1; if (reg > 0x11 && reg < 0x20) return -1; switch (etd->info.hw_version) { case 1: if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_WRITE) || ps2_sliced_command(&psmouse->ps2dev, reg) || ps2_sliced_command(&psmouse->ps2dev, val) || ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; case 2: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, val) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; case 3: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, val) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; case 4: if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, reg) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || elantech_ps2_command(psmouse, NULL, val) || elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { rc = -1; } break; } if (rc) psmouse_err(psmouse, "failed to write register 0x%02x with value 0x%02x.\n", reg, val); return rc; } /* * Dump a complete mouse movement packet to the syslog */ static void elantech_packet_dump(struct psmouse *psmouse) { psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n", psmouse->pktsize, psmouse->packet); } /* * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in * fw_version for this is based on the following fw_version & caps table: * * Laptop-model: fw_version: caps: buttons: * Acer S3 0x461f00 10, 13, 0e clickpad * Acer S7-392 0x581f01 50, 17, 0d clickpad * Acer V5-131 0x461f02 01, 16, 0c clickpad * Acer V5-551 0x461f00 ? clickpad * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons * Asus TP500LN 0x381f17 10, 14, 0e clickpad * Asus X750JN 0x381f17 10, 14, 0e clickpad * Asus UX31 0x361f00 20, 15, 0e clickpad * Asus UX32VD 0x361f02 00, 15, 0e clickpad * Avatar AVIU-145A2 0x361f00 ? clickpad * Fujitsu CELSIUS H760 0x570f02 40, 14, 0c 3 hw buttons (**) * Fujitsu CELSIUS H780 0x5d0f02 41, 16, 0d 3 hw buttons (**) * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**) * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*) * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*) * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad * Samsung NP900X3E-A02 0x575f03 ? clickpad * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons * Samsung RF710 0x450f00 ? 2 hw buttons * System76 Pangolin 0x250f01 ? 2 hw buttons * (*) + 3 trackpoint buttons * (**) + 0 trackpoint buttons * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps */ static inline int elantech_is_buttonpad(struct elantech_device_info *info) { return info->fw_version & 0x001000; } /* * Interpret complete data packets and report absolute mode input events for * hardware version 1. (4 byte packets) */ static void elantech_report_absolute_v1(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int fingers; if (etd->info.fw_version < 0x020000) { /* * byte 0: D U p1 p2 1 p3 R L * byte 1: f 0 th tw x9 x8 y9 y8 */ fingers = ((packet[1] & 0x80) >> 7) + ((packet[1] & 0x30) >> 4); } else { /* * byte 0: n1 n0 p2 p1 1 p3 R L * byte 1: 0 0 0 0 x9 x8 y9 y8 */ fingers = (packet[0] & 0xc0) >> 6; } if (etd->info.jumpy_cursor) { if (fingers != 1) { etd->single_finger_reports = 0; } else if (etd->single_finger_reports < 2) { /* Discard first 2 reports of one finger, bogus */ etd->single_finger_reports++; elantech_debug("discarding packet\n"); return; } } input_report_key(dev, BTN_TOUCH, fingers != 0); /* * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */ if (fingers) { input_report_abs(dev, ABS_X, ((packet[1] & 0x0c) << 6) | packet[2]); input_report_abs(dev, ABS_Y, etd->y_max - (((packet[1] & 0x03) << 8) | packet[3])); } input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); psmouse_report_standard_buttons(dev, packet[0]); if (etd->info.fw_version < 0x020000 && (etd->info.capabilities[0] & ETP_CAP_HAS_ROCKER)) { /* rocker up */ input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); /* rocker down */ input_report_key(dev, BTN_BACK, packet[0] & 0x80); } input_sync(dev); } static void elantech_set_slot(struct input_dev *dev, int slot, bool active, unsigned int x, unsigned int y) { input_mt_slot(dev, slot); input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); if (active) { input_report_abs(dev, ABS_MT_POSITION_X, x); input_report_abs(dev, ABS_MT_POSITION_Y, y); } } /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ static void elantech_report_semi_mt_data(struct input_dev *dev, unsigned int num_fingers, unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2) { elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2); } /* * Interpret complete data packets and report absolute mode input events for * hardware version 2. (6 byte packets) */ static void elantech_report_absolute_v2(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; struct input_dev *dev = psmouse->dev; unsigned char *packet = psmouse->packet; unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0; unsigned int width = 0, pres = 0; /* byte 0: n1 n0 . . . . R L */ fingers = (packet[0] & 0xc0) >> 6; switch (fingers) { case 3: /* * Same as one finger, except report of more than 3 fingers: * byte 3: n4 . w1 w0 . . . . */ if (packet[3] & 0x80) fingers = 4; fallthrough; case 1: /* * byte 1: . . . . x11 x10 x9 x8 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */ x1 = ((packet[1] & 0x0f) << 8) | packet[2]; /* * byte 4: . . . . y11 y10 y9 y8 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */ y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); break; case 2: /* * The coordinate of each finger is reported separately * with a lower resolution for two finger touches: * byte 0: . . ay8 ax8 . . . . * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */ x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2; /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ y1 = etd->y_max - ((((packet[0] & 0x20) << 3) | packet[2]) << 2); /* * byte 3: . . by8 bx8 . . . . * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 */ x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2; /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ y2 = etd->y_max - ((((packet[3] & 0x20) << 3) | packet[5]) << 2); /* Unknown so just report sensible values */ pres = 127; width = 7; break; } input_report_key(dev, BTN_TOUCH, fingers != 0); if (fingers != 0) { input_report_abs(dev, ABS_X, x1); input_report_abs(dev, ABS_Y, y1); } elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4); psmouse_report_standard_buttons(dev, packet[0]); if (etd->info.reports_pressure) { input_report_abs(dev, ABS_PRESSURE, pres); input_report_abs(dev, ABS_TOOL_WIDTH, width); } input_sync(dev); } static void elantech_report_trackpoint(struct psmouse *psmouse, int packet_type) { /* * byte 0: 0 0 sx sy 0 M R L * byte 1:~sx 0 0 0 0 0 0 0 * byte 2:~sy 0 0 0 0 0 0 0 * byte 3: 0 0 ~sy ~sx 0 1 1 0 * byte 4: x7 x6 x5 x4 x3 x2 x1 x0 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 * * x and y are written in two's complement spread * over 9 bits with sx/sy the relative top bit and * x7..x0 and y7..y0 the lower bits. * The sign of y is opposite to what the input driver * expects for a relative movement */ struct elantech_data *etd = psmouse->private; struct input_dev *tp_dev = etd->tp_dev; unsigned char *packet = psmouse->packet; int x, y; u32 t; t = get_unaligned_le32(&packet[0]); switch (t & ~7U) { case 0x06000030U: case 0x16008020U: case 0x26800010U: case 0x36808000U: /* * This firmware misreport coordinates for trackpoint * occasionally. Discard packets outside of [-127, 127] range * to prevent cursor jumps. */ if (packet[4] == 0x80 || packet[5] == 0x80 || packet[1] >> 7 == packet[4] >> 7 || packet[2] >> 7 == packet[5] >> 7) { elantech_debug("discarding packet [%6ph]\n", packet); break; } x = packet[4] - (int)((packet[1]^0x80) << 1); y = (int)((packet[2]^0x80) << 1) - packet[5]; psmouse_report_standard_buttons(tp_dev, packet[0]); input_report_rel(tp_dev, REL_X, x); input_report_rel(tp_dev, REL_Y, y); input_sync(tp_dev); break; default: /* Dump unexpected packet sequences if debug=1 (default) */ if (etd->info.debug == 1) elantech_packet_dump(psmouse); break; } } /* * Interpret complete data packets and report absolute mode input events for * hardware version 3. (12 byte packets for two fingers) */ static void elantech_report_absolute_v3(struct psmouse *psmouse, int packet_type) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; unsigned int width = 0, pres = 0; /* byte 0: n1 n0 . . . . R L */ fingers = (packet[0] & 0xc0) >> 6; switch (fingers) { case 3: case 1: /* * byte 1: . . . . x11 x10 x9 x8 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */ x1 = ((packet[1] & 0x0f) << 8) | packet[2]; /* * byte 4: . . . . y11 y10 y9 y8 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */ y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); break; case 2: if (packet_type == PACKET_V3_HEAD) { /* * byte 1: . . . . ax11 ax10 ax9 ax8 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */ etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2]; /* * byte 4: . . . . ay11 ay10 ay9 ay8 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ etd->mt[0].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); /* * wait for next packet */ return; } /* packet_type == PACKET_V3_TAIL */ x1 = etd->mt[0].x; y1 = etd->mt[0].y; x2 = ((packet[1] & 0x0f) << 8) | packet[2]; y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); break; } pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); input_report_key(dev, BTN_TOUCH, fingers != 0); if (fingers != 0) { input_report_abs(dev, ABS_X, x1); input_report_abs(dev, ABS_Y, y1); } elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); /* For clickpads map both buttons to BTN_LEFT */ if (elantech_is_buttonpad(&etd->info)) input_report_key(dev, BTN_LEFT, packet[0] & 0x03); else psmouse_report_standard_buttons(dev, packet[0]); input_report_abs(dev, ABS_PRESSURE, pres); input_report_abs(dev, ABS_TOOL_WIDTH, width); input_sync(dev); } static void elantech_input_sync_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; /* For clickpads map both buttons to BTN_LEFT */ if (elantech_is_buttonpad(&etd->info)) input_report_key(dev, BTN_LEFT, packet[0] & 0x03); else psmouse_report_standard_buttons(dev, packet[0]); input_mt_report_pointer_emulation(dev, true); input_sync(dev); } static void process_packet_status_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; unsigned char *packet = psmouse->packet; unsigned fingers; int i; /* notify finger state change */ fingers = packet[1] & 0x1f; for (i = 0; i < ETP_MAX_FINGERS; i++) { if ((fingers & (1 << i)) == 0) { input_mt_slot(dev, i); input_mt_report_slot_state(dev, MT_TOOL_FINGER, false); } } elantech_input_sync_v4(psmouse); } static void process_packet_head_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int id; int pres, traces; id = ((packet[3] & 0xe0) >> 5) - 1; if (id < 0 || id >= ETP_MAX_FINGERS) return; etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2]; etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); traces = (packet[0] & 0xf0) >> 4; input_mt_slot(dev, id); input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); input_report_abs(dev, ABS_MT_PRESSURE, pres); input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width); /* report this for backwards compatibility */ input_report_abs(dev, ABS_TOOL_WIDTH, traces); elantech_input_sync_v4(psmouse); } static void process_packet_motion_v4(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0; int id, sid; id = ((packet[0] & 0xe0) >> 5) - 1; if (id < 0 || id >= ETP_MAX_FINGERS) return; sid = ((packet[3] & 0xe0) >> 5) - 1; weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1; /* * Motion packets give us the delta of x, y values of specific fingers, * but in two's complement. Let the compiler do the conversion for us. * Also _enlarge_ the numbers to int, in case of overflow. */ delta_x1 = (signed char)packet[1]; delta_y1 = (signed char)packet[2]; delta_x2 = (signed char)packet[4]; delta_y2 = (signed char)packet[5]; etd->mt[id].x += delta_x1 * weight; etd->mt[id].y -= delta_y1 * weight; input_mt_slot(dev, id); input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); if (sid >= 0 && sid < ETP_MAX_FINGERS) { etd->mt[sid].x += delta_x2 * weight; etd->mt[sid].y -= delta_y2 * weight; input_mt_slot(dev, sid); input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x); input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y); } elantech_input_sync_v4(psmouse); } static void elantech_report_absolute_v4(struct psmouse *psmouse, int packet_type) { switch (packet_type) { case PACKET_V4_STATUS: process_packet_status_v4(psmouse); break; case PACKET_V4_HEAD: process_packet_head_v4(psmouse); break; case PACKET_V4_MOTION: process_packet_motion_v4(psmouse); break; case PACKET_UNKNOWN: default: /* impossible to get here */ break; } } static int elantech_packet_check_v1(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; unsigned char p1, p2, p3; /* Parity bits are placed differently */ if (etd->info.fw_version < 0x020000) { /* byte 0: D U p1 p2 1 p3 R L */ p1 = (packet[0] & 0x20) >> 5; p2 = (packet[0] & 0x10) >> 4; } else { /* byte 0: n1 n0 p2 p1 1 p3 R L */ p1 = (packet[0] & 0x10) >> 4; p2 = (packet[0] & 0x20) >> 5; } p3 = (packet[0] & 0x04) >> 2; return etd->parity[packet[1]] == p1 && etd->parity[packet[2]] == p2 && etd->parity[packet[3]] == p3; } static int elantech_debounce_check_v2(struct psmouse *psmouse) { /* * When we encounter packet that matches this exactly, it means the * hardware is in debounce status. Just ignore the whole packet. */ static const u8 debounce_packet[] = { 0x84, 0xff, 0xff, 0x02, 0xff, 0xff }; unsigned char *packet = psmouse->packet; return !memcmp(packet, debounce_packet, sizeof(debounce_packet)); } static int elantech_packet_check_v2(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; /* * V2 hardware has two flavors. Older ones that do not report pressure, * and newer ones that reports pressure and width. With newer ones, all * packets (1, 2, 3 finger touch) have the same constant bits. With * older ones, 1/3 finger touch packets and 2 finger touch packets * have different constant bits. * With all three cases, if the constant bits are not exactly what I * expected, I consider them invalid. */ if (etd->info.reports_pressure) return (packet[0] & 0x0c) == 0x04 && (packet[3] & 0x0f) == 0x02; if ((packet[0] & 0xc0) == 0x80) return (packet[0] & 0x0c) == 0x0c && (packet[3] & 0x0e) == 0x08; return (packet[0] & 0x3c) == 0x3c && (packet[1] & 0xf0) == 0x00 && (packet[3] & 0x3e) == 0x38 && (packet[4] & 0xf0) == 0x00; } /* * We check the constant bits to determine what packet type we get, * so packet checking is mandatory for v3 and later hardware. */ static int elantech_packet_check_v3(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; static const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff }; unsigned char *packet = psmouse->packet; /* * check debounce first, it has the same signature in byte 0 * and byte 3 as PACKET_V3_HEAD. */ if (!memcmp(packet, debounce_packet, sizeof(debounce_packet))) return PACKET_DEBOUNCE; /* * If the hardware flag 'crc_enabled' is set the packets have * different signatures. */ if (etd->info.crc_enabled) { if ((packet[3] & 0x09) == 0x08) return PACKET_V3_HEAD; if ((packet[3] & 0x09) == 0x09) return PACKET_V3_TAIL; } else { if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) return PACKET_V3_HEAD; if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) return PACKET_V3_TAIL; if ((packet[3] & 0x0f) == 0x06) return PACKET_TRACKPOINT; } return PACKET_UNKNOWN; } static int elantech_packet_check_v4(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; unsigned char packet_type = packet[3] & 0x03; unsigned int ic_version; bool sanity_check; if (etd->tp_dev && (packet[3] & 0x0f) == 0x06) return PACKET_TRACKPOINT; /* This represents the version of IC body. */ ic_version = (etd->info.fw_version & 0x0f0000) >> 16; /* * Sanity check based on the constant bits of a packet. * The constant bits change depending on the value of * the hardware flag 'crc_enabled' and the version of * the IC body, but are the same for every packet, * regardless of the type. */ if (etd->info.crc_enabled) sanity_check = ((packet[3] & 0x08) == 0x00); else if (ic_version == 7 && etd->info.samples[1] == 0x2A) sanity_check = ((packet[3] & 0x1c) == 0x10); else sanity_check = ((packet[0] & 0x08) == 0x00 && (packet[3] & 0x1c) == 0x10); if (!sanity_check) return PACKET_UNKNOWN; switch (packet_type) { case 0: return PACKET_V4_STATUS; case 1: return PACKET_V4_HEAD; case 2: return PACKET_V4_MOTION; } return PACKET_UNKNOWN; } /* * Process byte stream from mouse and handle complete packets */ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; int packet_type; if (psmouse->pktcnt < psmouse->pktsize) return PSMOUSE_GOOD_DATA; if (etd->info.debug > 1) elantech_packet_dump(psmouse); switch (etd->info.hw_version) { case 1: if (etd->info.paritycheck && !elantech_packet_check_v1(psmouse)) return PSMOUSE_BAD_DATA; elantech_report_absolute_v1(psmouse); break; case 2: /* ignore debounce */ if (elantech_debounce_check_v2(psmouse)) return PSMOUSE_FULL_PACKET; if (etd->info.paritycheck && !elantech_packet_check_v2(psmouse)) return PSMOUSE_BAD_DATA; elantech_report_absolute_v2(psmouse); break; case 3: packet_type = elantech_packet_check_v3(psmouse); switch (packet_type) { case PACKET_UNKNOWN: return PSMOUSE_BAD_DATA; case PACKET_DEBOUNCE: /* ignore debounce */ break; case PACKET_TRACKPOINT: elantech_report_trackpoint(psmouse, packet_type); break; default: elantech_report_absolute_v3(psmouse, packet_type); break; } break; case 4: packet_type = elantech_packet_check_v4(psmouse); switch (packet_type) { case PACKET_UNKNOWN: return PSMOUSE_BAD_DATA; case PACKET_TRACKPOINT: elantech_report_trackpoint(psmouse, packet_type); break; default: elantech_report_absolute_v4(psmouse, packet_type); break; } break; } return PSMOUSE_FULL_PACKET; } /* * This writes the reg_07 value again to the hardware at the end of every * set_rate call because the register loses its value. reg_07 allows setting * absolute mode on v4 hardware */ static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse, unsigned int rate) { struct elantech_data *etd = psmouse->private; etd->original_set_rate(psmouse, rate); if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) psmouse_err(psmouse, "restoring reg_07 failed\n"); } /* * Put the touchpad into absolute mode */ static int elantech_set_absolute_mode(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; unsigned char val; int tries = ETP_READ_BACK_TRIES; int rc = 0; switch (etd->info.hw_version) { case 1: etd->reg_10 = 0x16; etd->reg_11 = 0x8f; if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || elantech_write_reg(psmouse, 0x11, etd->reg_11)) { rc = -1; } break; case 2: /* Windows driver values */ etd->reg_10 = 0x54; etd->reg_11 = 0x88; /* 0x8a */ etd->reg_21 = 0x60; /* 0x00 */ if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || elantech_write_reg(psmouse, 0x11, etd->reg_11) || elantech_write_reg(psmouse, 0x21, etd->reg_21)) { rc = -1; } break; case 3: if (etd->info.set_hw_resolution) etd->reg_10 = 0x0b; else etd->reg_10 = 0x01; if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) rc = -1; break; case 4: etd->reg_07 = 0x01; if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) rc = -1; goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */ } if (rc == 0) { /* * Read back reg 0x10. For hardware version 1 we must make * sure the absolute mode bit is set. For hardware version 2 * the touchpad is probably initializing and not ready until * we read back the value we just wrote. */ do { rc = elantech_read_reg(psmouse, 0x10, &val); if (rc == 0) break; tries--; elantech_debug("retrying read (%d).\n", tries); msleep(ETP_READ_BACK_DELAY); } while (tries > 0); if (rc) { psmouse_err(psmouse, "failed to read back register 0x10.\n"); } else if (etd->info.hw_version == 1 && !(val & ETP_R10_ABSOLUTE_MODE)) { psmouse_err(psmouse, "touchpad refuses to switch to absolute mode.\n"); rc = -1; } } skip_readback_reg_10: if (rc) psmouse_err(psmouse, "failed to initialise registers.\n"); return rc; } /* * (value from firmware) * 10 + 790 = dpi * we also have to convert dpi to dots/mm (*10/254 to avoid floating point) */ static unsigned int elantech_convert_res(unsigned int val) { return (val * 10 + 790) * 10 / 254; } static int elantech_get_resolution_v4(struct psmouse *psmouse, unsigned int *x_res, unsigned int *y_res, unsigned int *bus) { unsigned char param[3]; if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param)) return -1; *x_res = elantech_convert_res(param[1] & 0x0f); *y_res = elantech_convert_res((param[1] & 0xf0) >> 4); *bus = param[2]; return 0; } static void elantech_set_buttonpad_prop(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; if (elantech_is_buttonpad(&etd->info)) { __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); __clear_bit(BTN_RIGHT, dev->keybit); } } /* * Some hw_version 4 models do have a middle button */ static const struct dmi_system_id elantech_dmi_has_middle_button[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) { /* Fujitsu H730 has a middle button */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"), }, }, { /* Fujitsu H760 also has a middle button */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"), }, }, { /* Fujitsu H780 also has a middle button */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H780"), }, }, #endif { } }; /* * Set the appropriate event bits for the input subsystem */ static int elantech_set_input_params(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct elantech_data *etd = psmouse->private; struct elantech_device_info *info = &etd->info; unsigned int x_min = info->x_min, y_min = info->y_min, x_max = info->x_max, y_max = info->y_max, width = info->width; __set_bit(INPUT_PROP_POINTER, dev->propbit); __set_bit(EV_KEY, dev->evbit); __set_bit(EV_ABS, dev->evbit); __clear_bit(EV_REL, dev->evbit); __set_bit(BTN_LEFT, dev->keybit); if (info->has_middle_button) __set_bit(BTN_MIDDLE, dev->keybit); __set_bit(BTN_RIGHT, dev->keybit); __set_bit(BTN_TOUCH, dev->keybit); __set_bit(BTN_TOOL_FINGER, dev->keybit); __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); switch (info->hw_version) { case 1: /* Rocker button */ if (info->fw_version < 0x020000 && (info->capabilities[0] & ETP_CAP_HAS_ROCKER)) { __set_bit(BTN_FORWARD, dev->keybit); __set_bit(BTN_BACK, dev->keybit); } input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); break; case 2: __set_bit(BTN_TOOL_QUADTAP, dev->keybit); __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); fallthrough; case 3: if (info->hw_version == 3) elantech_set_buttonpad_prop(psmouse); input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); if (info->reports_pressure) { input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, ETP_PMAX_V2, 0, 0); input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, ETP_WMAX_V2, 0, 0); } input_mt_init_slots(dev, 2, INPUT_MT_SEMI_MT); input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); break; case 4: elantech_set_buttonpad_prop(psmouse); __set_bit(BTN_TOOL_QUADTAP, dev->keybit); /* For X to recognize me as touchpad. */ input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); /* * range of pressure and width is the same as v2, * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility. */ input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, ETP_PMAX_V2, 0, 0); input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, ETP_WMAX_V2, 0, 0); /* Multitouch capable pad, up to 5 fingers. */ input_mt_init_slots(dev, ETP_MAX_FINGERS, 0); input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2, ETP_PMAX_V2, 0, 0); /* * The firmware reports how many trace lines the finger spans, * convert to surface unit as Protocol-B requires. */ input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0, ETP_WMAX_V2 * width, 0, 0); break; } input_abs_set_res(dev, ABS_X, info->x_res); input_abs_set_res(dev, ABS_Y, info->y_res); if (info->hw_version > 1) { input_abs_set_res(dev, ABS_MT_POSITION_X, info->x_res); input_abs_set_res(dev, ABS_MT_POSITION_Y, info->y_res); } etd->y_max = y_max; etd->width = width; return 0; } struct elantech_attr_data { size_t field_offset; unsigned char reg; }; /* * Display a register value by reading a sysfs entry */ static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, char *buf) { struct elantech_data *etd = psmouse->private; struct elantech_attr_data *attr = data; unsigned char *reg = (unsigned char *) etd + attr->field_offset; int rc = 0; if (attr->reg) rc = elantech_read_reg(psmouse, attr->reg, reg); return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); } /* * Write a register value by writing a sysfs entry */ static ssize_t elantech_set_int_attr(struct psmouse *psmouse, void *data, const char *buf, size_t count) { struct elantech_data *etd = psmouse->private; struct elantech_attr_data *attr = data; unsigned char *reg = (unsigned char *) etd + attr->field_offset; unsigned char value; int err; err = kstrtou8(buf, 16, &value); if (err) return err; /* Do we need to preserve some bits for version 2 hardware too? */ if (etd->info.hw_version == 1) { if (attr->reg == 0x10) /* Force absolute mode always on */ value |= ETP_R10_ABSOLUTE_MODE; else if (attr->reg == 0x11) /* Force 4 byte mode always on */ value |= ETP_R11_4_BYTE_MODE; } if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) *reg = value; return count; } #define ELANTECH_INT_ATTR(_name, _register) \ static struct elantech_attr_data elantech_attr_##_name = { \ .field_offset = offsetof(struct elantech_data, _name), \ .reg = _register, \ }; \ PSMOUSE_DEFINE_ATTR(_name, 0644, \ &elantech_attr_##_name, \ elantech_show_int_attr, \ elantech_set_int_attr) #define ELANTECH_INFO_ATTR(_name) \ static struct elantech_attr_data elantech_attr_##_name = { \ .field_offset = offsetof(struct elantech_data, info) + \ offsetof(struct elantech_device_info, _name), \ .reg = 0, \ }; \ PSMOUSE_DEFINE_ATTR(_name, 0644, \ &elantech_attr_##_name, \ elantech_show_int_attr, \ elantech_set_int_attr) ELANTECH_INT_ATTR(reg_07, 0x07); ELANTECH_INT_ATTR(reg_10, 0x10); ELANTECH_INT_ATTR(reg_11, 0x11); ELANTECH_INT_ATTR(reg_20, 0x20); ELANTECH_INT_ATTR(reg_21, 0x21); ELANTECH_INT_ATTR(reg_22, 0x22); ELANTECH_INT_ATTR(reg_23, 0x23); ELANTECH_INT_ATTR(reg_24, 0x24); ELANTECH_INT_ATTR(reg_25, 0x25); ELANTECH_INT_ATTR(reg_26, 0x26); ELANTECH_INFO_ATTR(debug); ELANTECH_INFO_ATTR(paritycheck); ELANTECH_INFO_ATTR(crc_enabled); static struct attribute *elantech_attrs[] = { &psmouse_attr_reg_07.dattr.attr, &psmouse_attr_reg_10.dattr.attr, &psmouse_attr_reg_11.dattr.attr, &psmouse_attr_reg_20.dattr.attr, &psmouse_attr_reg_21.dattr.attr, &psmouse_attr_reg_22.dattr.attr, &psmouse_attr_reg_23.dattr.attr, &psmouse_attr_reg_24.dattr.attr, &psmouse_attr_reg_25.dattr.attr, &psmouse_attr_reg_26.dattr.attr, &psmouse_attr_debug.dattr.attr, &psmouse_attr_paritycheck.dattr.attr, &psmouse_attr_crc_enabled.dattr.attr, NULL }; static const struct attribute_group elantech_attr_group = { .attrs = elantech_attrs, }; static bool elantech_is_signature_valid(const unsigned char *param) { static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; int i; if (param[0] == 0) return false; if (param[1] == 0) return true; /* * Some hw_version >= 4 models have a revision higher then 20. Meaning * that param[2] may be 10 or 20, skip the rates check for these. */ if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f && param[2] < 40) return true; for (i = 0; i < ARRAY_SIZE(rates); i++) if (param[2] == rates[i]) return false; return true; } /* * Use magic knock to detect Elantech touchpad */ int elantech_detect(struct psmouse *psmouse, bool set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char param[3]; ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n"); return -1; } /* * Report this in case there are Elantech models that use a different * set of magic numbers */ if (param[0] != 0x3c || param[1] != 0x03 || (param[2] != 0xc8 && param[2] != 0x00)) { psmouse_dbg(psmouse, "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", param[0], param[1], param[2]); return -1; } /* * Query touchpad's firmware version and see if it reports known * value to avoid mis-detection. Logitech mice are known to respond * to Elantech magic knock and there might be more. */ if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { psmouse_dbg(psmouse, "failed to query firmware version.\n"); return -1; } psmouse_dbg(psmouse, "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", param[0], param[1], param[2]); if (!elantech_is_signature_valid(param)) { psmouse_dbg(psmouse, "Probably not a real Elantech touchpad. Aborting.\n"); return -1; } if (set_properties) { psmouse->vendor = "Elantech"; psmouse->name = "Touchpad"; } return 0; } /* * Clean up sysfs entries when disconnecting */ static void elantech_disconnect(struct psmouse *psmouse) { struct elantech_data *etd = psmouse->private; /* * We might have left a breadcrumb when trying to * set up SMbus companion. */ psmouse_smbus_cleanup(psmouse); if (etd->tp_dev) input_unregister_device(etd->tp_dev); sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &elantech_attr_group); kfree(psmouse->private); psmouse->private = NULL; } /* * Put the touchpad back into absolute mode when reconnecting */ static int elantech_reconnect(struct psmouse *psmouse) { psmouse_reset(psmouse); if (elantech_detect(psmouse, 0)) return -1; if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad back into absolute mode.\n"); return -1; } return 0; } /* * Some hw_version 4 models do not work with crc_disabled */ static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) { /* Fujitsu H730 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"), }, }, { /* Fujitsu H760 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"), }, }, { /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"), }, }, { /* Fujitsu LIFEBOOK E546 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E546"), }, }, { /* Fujitsu LIFEBOOK E547 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E547"), }, }, { /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E554"), }, }, { /* Fujitsu LIFEBOOK E556 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E556"), }, }, { /* Fujitsu LIFEBOOK E557 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E557"), }, }, { /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"), }, }, #endif { } }; /* * Some hw_version 3 models go into error state when we try to set * bit 3 and/or bit 1 of r10. */ static const struct dmi_system_id no_hw_res_dmi_table[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) { /* Gigabyte U2442 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), DMI_MATCH(DMI_PRODUCT_NAME, "U2442"), }, }, #endif { } }; /* * Change Report id 0x5E to 0x5F. */ static int elantech_change_report_id(struct psmouse *psmouse) { /* * NOTE: the code is expecting to receive param[] as an array of 3 * items (see __ps2_command()), even if in this case only 2 are * actually needed. Make sure the array size is 3 to avoid potential * stack out-of-bound accesses. */ unsigned char param[3] = { 0x10, 0x03 }; if (elantech_write_reg_params(psmouse, 0x7, param) || elantech_read_reg_params(psmouse, 0x7, param) || param[0] != 0x10 || param[1] != 0x03) { psmouse_err(psmouse, "Unable to change report ID to 0x5f.\n"); return -EIO; } return 0; } /* * determine hardware version and set some properties according to it. */ static int elantech_set_properties(struct elantech_device_info *info) { /* This represents the version of IC body. */ info->ic_version = (info->fw_version & 0x0f0000) >> 16; /* Early version of Elan touchpads doesn't obey the rule. */ if (info->fw_version < 0x020030 || info->fw_version == 0x020600) info->hw_version = 1; else { switch (info->ic_version) { case 2: case 4: info->hw_version = 2; break; case 5: info->hw_version = 3; break; case 6 ... 15: info->hw_version = 4; break; default: return -1; } } /* Get information pattern for hw_version 4 */ info->pattern = 0x00; if (info->ic_version == 0x0f && (info->fw_version & 0xff) <= 0x02) info->pattern = info->fw_version & 0xff; /* decide which send_cmd we're gonna use early */ info->send_cmd = info->hw_version >= 3 ? elantech_send_cmd : synaptics_send_cmd; /* Turn on packet checking by default */ info->paritycheck = 1; /* * This firmware suffers from misreporting coordinates when * a touch action starts causing the mouse cursor or scrolled page * to jump. Enable a workaround. */ info->jumpy_cursor = (info->fw_version == 0x020022 || info->fw_version == 0x020600); if (info->hw_version > 1) { /* For now show extra debug information */ info->debug = 1; if (info->fw_version >= 0x020800) info->reports_pressure = true; } /* * The signatures of v3 and v4 packets change depending on the * value of this hardware flag. */ info->crc_enabled = (info->fw_version & 0x4000) == 0x4000 || dmi_check_system(elantech_dmi_force_crc_enabled); /* Enable real hardware resolution on hw_version 3 ? */ info->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table); return 0; } static int elantech_query_info(struct psmouse *psmouse, struct elantech_device_info *info) { unsigned char param[3]; unsigned char traces; unsigned char ic_body[3]; memset(info, 0, sizeof(*info)); /* * Do the version query again so we can store the result */ if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { psmouse_err(psmouse, "failed to query firmware version.\n"); return -EINVAL; } info->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; if (elantech_set_properties(info)) { psmouse_err(psmouse, "unknown hardware version, aborting...\n"); return -EINVAL; } psmouse_info(psmouse, "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n", info->hw_version, param[0], param[1], param[2]); if (info->send_cmd(psmouse, ETP_CAPABILITIES_QUERY, info->capabilities)) { psmouse_err(psmouse, "failed to query capabilities.\n"); return -EINVAL; } psmouse_info(psmouse, "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", info->capabilities[0], info->capabilities[1], info->capabilities[2]); if (info->hw_version != 1) { if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, info->samples)) { psmouse_err(psmouse, "failed to query sample data\n"); return -EINVAL; } psmouse_info(psmouse, "Elan sample query result %02x, %02x, %02x\n", info->samples[0], info->samples[1], info->samples[2]); } if (info->pattern > 0x00 && info->ic_version == 0xf) { if (info->send_cmd(psmouse, ETP_ICBODY_QUERY, ic_body)) { psmouse_err(psmouse, "failed to query ic body\n"); return -EINVAL; } info->ic_version = be16_to_cpup((__be16 *)ic_body); psmouse_info(psmouse, "Elan ic body: %#04x, current fw version: %#02x\n", info->ic_version, ic_body[2]); } info->product_id = be16_to_cpup((__be16 *)info->samples); if (info->pattern == 0x00) info->product_id &= 0xff; if (info->samples[1] == 0x74 && info->hw_version == 0x03) { /* * This module has a bug which makes absolute mode * unusable, so let's abort so we'll be using standard * PS/2 protocol. */ psmouse_info(psmouse, "absolute mode broken, forcing standard PS/2 protocol\n"); return -ENODEV; } /* The MSB indicates the presence of the trackpoint */ info->has_trackpoint = (info->capabilities[0] & 0x80) == 0x80; if (info->has_trackpoint && info->ic_version == 0x0011 && (info->product_id == 0x08 || info->product_id == 0x09 || info->product_id == 0x0d || info->product_id == 0x0e)) { /* * This module has a bug which makes trackpoint in SMBus * mode return invalid data unless trackpoint is switched * from using 0x5e reports to 0x5f. If we are not able to * make the switch, let's abort initialization so we'll be * using standard PS/2 protocol. */ if (elantech_change_report_id(psmouse)) { psmouse_info(psmouse, "Trackpoint report is broken, forcing standard PS/2 protocol\n"); return -ENODEV; } } info->x_res = 31; info->y_res = 31; if (info->hw_version == 4) { if (elantech_get_resolution_v4(psmouse, &info->x_res, &info->y_res, &info->bus)) { psmouse_warn(psmouse, "failed to query resolution data.\n"); } } /* query range information */ switch (info->hw_version) { case 1: info->x_min = ETP_XMIN_V1; info->y_min = ETP_YMIN_V1; info->x_max = ETP_XMAX_V1; info->y_max = ETP_YMAX_V1; break; case 2: if (info->fw_version == 0x020800 || info->fw_version == 0x020b00 || info->fw_version == 0x020030) { info->x_min = ETP_XMIN_V2; info->y_min = ETP_YMIN_V2; info->x_max = ETP_XMAX_V2; info->y_max = ETP_YMAX_V2; } else { int i; int fixed_dpi; i = (info->fw_version > 0x020800 && info->fw_version < 0x020900) ? 1 : 2; if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) return -EINVAL; fixed_dpi = param[1] & 0x10; if (((info->fw_version >> 16) == 0x14) && fixed_dpi) { if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) return -EINVAL; info->x_max = (info->capabilities[1] - i) * param[1] / 2; info->y_max = (info->capabilities[2] - i) * param[2] / 2; } else if (info->fw_version == 0x040216) { info->x_max = 819; info->y_max = 405; } else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) { info->x_max = 900; info->y_max = 500; } else { info->x_max = (info->capabilities[1] - i) * 64; info->y_max = (info->capabilities[2] - i) * 64; } } break; case 3: if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) return -EINVAL; info->x_max = (0x0f & param[0]) << 8 | param[1]; info->y_max = (0xf0 & param[0]) << 4 | param[2]; break; case 4: if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) return -EINVAL; info->x_max = (0x0f & param[0]) << 8 | param[1]; info->y_max = (0xf0 & param[0]) << 4 | param[2]; traces = info->capabilities[1]; if ((traces < 2) || (traces > info->x_max)) return -EINVAL; info->width = info->x_max / (traces - 1); /* column number of traces */ info->x_traces = traces; /* row number of traces */ traces = info->capabilities[2]; if ((traces >= 2) && (traces <= info->y_max)) info->y_traces = traces; break; } /* check for the middle button: DMI matching or new v4 firmwares */ info->has_middle_button = dmi_check_system(elantech_dmi_has_middle_button) || (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) && !elantech_is_buttonpad(info)); return 0; } #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) /* * The newest Elantech device can use a secondary bus (over SMBus) which * provides a better bandwidth and allow a better control of the touchpads. * This is used to decide if we need to use this bus or not. */ enum { ELANTECH_SMBUS_NOT_SET = -1, ELANTECH_SMBUS_OFF, ELANTECH_SMBUS_ON, }; static int elantech_smbus = IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ? ELANTECH_SMBUS_NOT_SET : ELANTECH_SMBUS_OFF; module_param_named(elantech_smbus, elantech_smbus, int, 0644); MODULE_PARM_DESC(elantech_smbus, "Use a secondary bus for the Elantech device."); static const char * const i2c_blacklist_pnp_ids[] = { /* * These are known to not be working properly as bits are missing * in elan_i2c. */ NULL }; static int elantech_create_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) { struct property_entry i2c_props[11] = {}; struct i2c_board_info smbus_board = { I2C_BOARD_INFO("elan_i2c", 0x15), .flags = I2C_CLIENT_HOST_NOTIFY, }; unsigned int idx = 0; i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-x", info->x_max + 1); i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-y", info->y_max + 1); i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-x", info->x_min); i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-y", info->y_min); if (info->x_res) i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-x-mm", (info->x_max + 1) / info->x_res); if (info->y_res) i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-y-mm", (info->y_max + 1) / info->y_res); if (info->has_trackpoint) i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,trackpoint"); if (info->has_middle_button) i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,middle-button"); if (info->x_traces) i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,x_traces", info->x_traces); if (info->y_traces) i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,y_traces", info->y_traces); if (elantech_is_buttonpad(info)) i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,clickpad"); smbus_board.fwnode = fwnode_create_software_node(i2c_props, NULL); if (IS_ERR(smbus_board.fwnode)) return PTR_ERR(smbus_board.fwnode); return psmouse_smbus_init(psmouse, &smbus_board, NULL, 0, false, leave_breadcrumbs); } /* * elantech_setup_smbus - called once the PS/2 devices are enumerated * and decides to instantiate a SMBus InterTouch device. */ static int elantech_setup_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) { int error; if (elantech_smbus == ELANTECH_SMBUS_OFF) return -ENXIO; if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) { /* * New ICs are enabled by default, unless mentioned in * i2c_blacklist_pnp_ids. * Old ICs are up to the user to decide. */ if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) || psmouse_matches_pnp_id(psmouse, i2c_blacklist_pnp_ids)) return -ENXIO; } psmouse_info(psmouse, "Trying to set up SMBus access\n"); error = elantech_create_smbus(psmouse, info, leave_breadcrumbs); if (error) { if (error == -EAGAIN) psmouse_info(psmouse, "SMbus companion is not ready yet\n"); else psmouse_err(psmouse, "unable to create intertouch device\n"); return error; } return 0; } static bool elantech_use_host_notify(struct psmouse *psmouse, struct elantech_device_info *info) { if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version)) return true; switch (info->bus) { case ETP_BUS_PS2_ONLY: /* expected case */ break; case ETP_BUS_SMB_ALERT_ONLY: case ETP_BUS_PS2_SMB_ALERT: psmouse_dbg(psmouse, "Ignoring SMBus provider through alert protocol.\n"); break; case ETP_BUS_SMB_HST_NTFY_ONLY: case ETP_BUS_PS2_SMB_HST_NTFY: return true; default: psmouse_dbg(psmouse, "Ignoring SMBus bus provider %d.\n", info->bus); } return false; } int elantech_init_smbus(struct psmouse *psmouse) { struct elantech_device_info info; int error; psmouse_reset(psmouse); error = elantech_query_info(psmouse, &info); if (error) goto init_fail; if (info.hw_version < 4) { error = -ENXIO; goto init_fail; } return elantech_create_smbus(psmouse, &info, false); init_fail: psmouse_reset(psmouse); return error; } #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ /* * Initialize the touchpad and create sysfs entries */ static int elantech_setup_ps2(struct psmouse *psmouse, struct elantech_device_info *info) { struct elantech_data *etd; int i; int error = -EINVAL; struct input_dev *tp_dev; psmouse->private = etd = kzalloc(sizeof(*etd), GFP_KERNEL); if (!etd) return -ENOMEM; etd->info = *info; etd->parity[0] = 1; for (i = 1; i < 256; i++) etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad into absolute mode.\n"); goto init_fail; } if (info->fw_version == 0x381f17) { etd->original_set_rate = psmouse->set_rate; psmouse->set_rate = elantech_set_rate_restore_reg_07; } if (elantech_set_input_params(psmouse)) { psmouse_err(psmouse, "failed to query touchpad range.\n"); goto init_fail; } error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, &elantech_attr_group); if (error) { psmouse_err(psmouse, "failed to create sysfs attributes, error: %d.\n", error); goto init_fail; } if (info->has_trackpoint) { tp_dev = input_allocate_device(); if (!tp_dev) { error = -ENOMEM; goto init_fail_tp_alloc; } etd->tp_dev = tp_dev; snprintf(etd->tp_phys, sizeof(etd->tp_phys), "%s/input1", psmouse->ps2dev.serio->phys); tp_dev->phys = etd->tp_phys; tp_dev->name = "ETPS/2 Elantech TrackPoint"; tp_dev->id.bustype = BUS_I8042; tp_dev->id.vendor = 0x0002; tp_dev->id.product = PSMOUSE_ELANTECH; tp_dev->id.version = 0x0000; tp_dev->dev.parent = &psmouse->ps2dev.serio->dev; tp_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); tp_dev->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); tp_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); __set_bit(INPUT_PROP_POINTER, tp_dev->propbit); __set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit); error = input_register_device(etd->tp_dev); if (error < 0) goto init_fail_tp_reg; } psmouse->protocol_handler = elantech_process_byte; psmouse->disconnect = elantech_disconnect; psmouse->reconnect = elantech_reconnect; psmouse->fast_reconnect = NULL; psmouse->pktsize = info->hw_version > 1 ? 6 : 4; return 0; init_fail_tp_reg: input_free_device(tp_dev); init_fail_tp_alloc: sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &elantech_attr_group); init_fail: kfree(etd); return error; } int elantech_init_ps2(struct psmouse *psmouse) { struct elantech_device_info info; int error; psmouse_reset(psmouse); error = elantech_query_info(psmouse, &info); if (error) goto init_fail; error = elantech_setup_ps2(psmouse, &info); if (error) goto init_fail; return 0; init_fail: psmouse_reset(psmouse); return error; } int elantech_init(struct psmouse *psmouse) { struct elantech_device_info info; int error; psmouse_reset(psmouse); error = elantech_query_info(psmouse, &info); if (error) goto init_fail; #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) if (elantech_use_host_notify(psmouse, &info)) { if (!IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) || !IS_ENABLED(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)) { psmouse_warn(psmouse, "The touchpad can support a better bus than the too old PS/2 protocol. " "Make sure MOUSE_PS2_ELANTECH_SMBUS and MOUSE_ELAN_I2C_SMBUS are enabled to get a better touchpad experience.\n"); } error = elantech_setup_smbus(psmouse, &info, true); if (!error) return PSMOUSE_ELANTECH_SMBUS; } #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ error = elantech_setup_ps2(psmouse, &info); if (error < 0) { /* * Not using any flavor of Elantech support, so clean up * SMbus breadcrumbs, if any. */ psmouse_smbus_cleanup(psmouse); goto init_fail; } return PSMOUSE_ELANTECH; init_fail: psmouse_reset(psmouse); return error; } |